Cylinder-boring reamer



UNITEDg sry lorries eonnoN MARK rarissima', or MrLLnRsBURe, PENNSYLVANIA.

CYLINDER-soeurs BEAMER.

naoaoai.

To all whomc't may con-cern.' s

Be it known that I, GORDON MARK BRU BAKER, a citizen of the United States, residing at Millersburg, in the county of Dauphin and State of Pennsylvania, have invented new and useful Improvements in ofy the surface being bored, whereby cast iron cylindersl may belrapidly bored with a degree of smoothnessnot possible with other types of reamers. -V

Another object of the invention is to pro-y vide a reamer which admits of the more convenient resharpening of the cutters, ready and efficient clearancel of the chips, and supply of oil to the cutters and cylinder surfaces for an eas f and smoothcuttino' ac-` tion.

rllhe invention consists of the features of construction, combination and arrangement of parts, 4hereinafter fully described and claimed, reference being had to the accompanying drawing, in which embodying my invention. 1

nig. 2 is a vertical transverse section of the same.

Fig. 3 is a top plan view of the colla-r orV top lmember of the reamer.v 'n

Fig. i is a bottom plan view of the body portion or head of the rea-mer.

Referring to the drawing, i Y a tool shank, preferably of Morse taper type, said 4shank having a reduced tool carrying extremity formed to provide a lower threaded portion 2 and an upper smooth cylindrical portion 3,'the latter being surmounted by a iangeV or shfoul'der'll Iformed upon lthe base of the shank body proper.

Detachably secured upon the tool 'supf' porting portion of the shank is a tool comprising parts y5 and 6, the part 5 consist ing of a reamer head ,having .a threaded bore 7 to receive and engagel the part 2 of the shank, and the part 6 consisting of a collar having a central hub 8 which snugly embraces the shank portion 3, said collarbeing clamped between the reamer Ahead 5 and the annular shoulder e of the shank body. rlhe vcollar 6 serves as a ,detachable Specification of Letters Eatent. Pjntd 13 Application led April 1G, 1320. Serial No. 372,846. Y

i into position. Figure lv is a side elevation of a reamer f designates crown element for the reamer, which 'crown element provides for the more -ready r moval of the cutting blades of the reamer when occasion requires and also vserves as a lubricant Y reservoir, as hereinafter de-V scribed.

The head 5 is formed with a pilot portion 9, and disposed between this pilot' portionr and the adjacent portion of the body of the reamer head is an annular. groove 10. AThe outer face lof the body of the reamer is formed with angularly arranged (diagonal) grooves l1 forming seats to receive the correspondingly arranged cutter blades l2,

.and these grooves' l1 continue outwardly through the wall of the groove land the pilot portion 9, so as to provide for the ready and convenient insertion Vand removal of lthe blades, the clearance of chips vand the flow of lubricant to the surfaces to be lubriper or outer end edges arranged to` abut against the bottom of thev collar 6,'and it lwill be understood that whenever it is nec-V 4 allowing the blades tobe driven out'of or rlhe collar 6 comprisesabase or bottom w 'portion having the hub portion 8 extending upwardly therefrom yand ralso 'having an outer wall concentric with the hub portion.'

This construction provides an annular-chamber 13 opening through the top of the collar and which forms a lubricant reservoir. This chamber is designed to contain cotton waste or other suitable absorbent material which is satt-[rated with the oil in suiiicient quantity to allow the oil to iowby gravity therefrom to. the working parts for lubrication. The oil passes from the chamber 13 outwardly through primary voil feed h'oies le formed in the base of the collar, which holes communicate with the upper ends of channels i5 formed in the periphery ofthe cutter body and extending from the top edge thereof down tol and intersecting the annular groove l0. rlhese channels 15 receiveand provide proper clearance for the ships and convey the oil to the cutters, thus facilitating the discharge ofthe chips while the blades are kept constantly lubricated. Formed in the wall of the grooved' portionV 1 0 are radial yopenings 16 which are dispo-sed in alinement with the lower cated. The cutting blades l2 have their up-l 'i ends of the channels l5', and.

these openings 16 lead inwardly to a flaring chamber 17 formed in the base of the reamer head and opening through the outerend of the pilot portion '9.

It will be understood from the foregoing description that the chips passing forwardly through the channels l5 enter the groove l0 and thence pass radially through the openings 16 int-o the clearance channel 17' and drop through the latter down along the walls of the cylinder, thus Alneeping the cutters clear of chips and preventing choking of the clearance andlubrieant reed channels.

Yflowing through the channels l5 also passes into the groove l0 and through radial openings 16 into the chamber 17 and discharges through said chamber and between the periphery of the pilot portion 9 andthe walls of the cylinder, thus keepin e' the cylinder wall lubricated in advance of the cutters `and facilitating and rende ing easier the y,feed motion Vof the reamer, freedom of cutting well `as the action of the cutters on the walls of the cylinder. 'it is difficult and practically impossible rto smoothly cut the dry surfaces of castiron cylinders for well known reasons,`but by lubricating the walls in advance of the cutters this objection is largely overcome and i find that by the use Vof my reamer the cylinder'may not only be bored very rapidly but also very smoothly. The pilot portion 9 is preferably tapered to lit the cylinder before roaming, or in other words to conform tothe original diameter of the cylinder, thus insuV iig the pr per guid-Y ance of the tool in its i ed action. Y

|The mode of assemblingv the parts of the device will be apparent from the foregoing description, andiit will be understood that the direction of the threaded surfaces 2 and 7 may be suoli as to insure tightness of the clamping conneetion between the members 5 and 6' and their iiim: retention on the shank Y under the cutting stresses and strains, while at the saine time by revolving'the part 5 v:in the aro aerfdirection the elements of the device may be readily and conveniently dis- .assembled and thereafter assembled for use.

iny practice suitable means may be provided for supplying oil continuously to the chan;- ber 13, so that during the operation of the lreamer a slow flow of oil through each open- Aing le drop by drop or in a constant stream,

a cording to the fluidity of the oil may be secured to provide for the proper lubrication of the `blades and the cylinder walls in theoperation of the reamer as circumstances may require. Y

Having thus fully described my invention, l claim: l. A 'reaii er comprising a head having a clearance chamber opening through its forward portion, and provided with an annu-v lar series of longitudinally extending bladesk having their forward ends terminating in rear of said clearance chamber, and longitudinal oil grooves extending alongside said blades, said head further having channels leading from the forward ends of said grooves into said clearance chamber.

2. A reamer comprising a reamer head o having a' body portion and a pilot portion, said parts being peripherally spaced by an annular groove, said body -portionbeing provided with cutting blades and longitudinal channels extending alongside said blades,

Vand said pilotV portion having' a clearance chamber and-radial openings arranged in alinement with said channels and extendingl from the groove to said clearance chamber.

'reamer comprising a shank, a reamer head mounted on the shank and provided with a body-portion andY a pilot portion, an

annular groove being formedin the periph-^ ery of the reamer between said portions, cutter blades'mounted upon the body portion of the reamer, said body portion being providedwith channels extending from its up-V per edge to said groove, vand said ilot portion, having a clearance chamber opening Vvthrough its outer end and radial openings ,extending between said groove and chamber,

and a collar mounted upon the Vshank and having a lubricant reservoir provided with outlets communicating with said channels.

4C. A rearnercomprisingv a shank, a reamer head mounted upon the shank, cutter. blades carried by the reamer head, a collar upon the shank above the reamer head provided with .an oil reservoir having outlets therefrom,A

said reamer head being provided with' channels communicating with said openings and extending along the blades and to a point in advance thereof, and said reamer head having an open-front annular pilot portion arranged in advance of the blades and radial openings between the forward ends of the blades and the interior of said pilot portion.

5. A reamercomprising a shank, a head Y fitted upon theshank and comprising a body portion and a pilot portion, said portions being separated by an external annular groove,

receiving seats and oil' channels extending alongside the same and communicating with said groove, and said pilot portion beingl pro Y ooRDoN MARK Banni-inne;

vsaid bod ortion beine' arovided with blade Y 

